JADE™ ECONOMIZER MODULE
15 63-2700—01
SETUP AND CONFIGURATION
Before being placed into service, the JADE™ Economizer
module must be setup and configured for the installed system.
IMPORTANT
During setup, the Economizer module is live at all
times.
The setup process uses a hierarchical menu structure that is
easy to use. You press the
and arrow buttons to move
forward and backward through the menus and press the
↵
button to select and confirm setup item changes.
Time-out and Screensaver
When no buttons have been pressed for 10 minutes, the LCD
displays a screen saver, which cycles through the Status items.
Each Status items displays in turn and cycles to the next item
after 5 seconds:
Enthalpy Settings
When the OA temperature, enthalpy and dew point are below
the respective setpoints, the outside air can be used for
economizing. Fig. 12 shows the new single enthalpy
boundaries in the W7220. There are 5 boundaries (setpoints
ES1 through ES5), which are defined by dry bulb temperature,
enthalpy and dew point.
Refer to Table 6 for the ENTH CURVE setpoint values.
Fig. 12. Single Enthalpy curve and boundaries.
To use enthalpy the W7220 must have a C7400S Sylkbus
sensor for OA. The W7220 calculates the enthalpy and dew
point using the OA temperature and humidity input from the OA
sensor. When the OA temperature, OA humidity and OA dew
point are all below the selected boundary, the economizer sets
the economizing mode to YES, economizing is available.
When all of the OA conditions are above the selected
boundary, the conditions are not good to economize and the
mode is set to NO.
Fig. 12 shows the 5 current boundaries. There is also a high
limit boundary for differential enthalpy. The high limit boundary
is ES1 when there are no stages of mechanical cooling
energized and HL when a compressor stage is energized.
Table 6 provides the values for each boundary limit.
Economizer Setup and Configuration
To setup and configure the Economizer module, use the
System Setup menu, the Advanced Setup menu (if necessary),
and the Setpoints menu. Refer to Table 7.
Setup and configure the module in the following order:
1. Enter the System Setup parameters.
2. If needed, enter the Advanced Setup parameters.
3. Enter the Setpoint settings.
ECONOMIXING
AVAILABLE
NOT AVAILABLE
TEMPERATURE
ABSOLUTE HUMIDITY
RA TEMP
R
A
H
U
M
(
%
R
H
)
ENTHAL
PY
ES4 ES3 ES2 ES1 HL
P2 (T,RH)
DUAL ENTHALPY
HIGH LIMIT
SINGLE ENTHALPY
ES5
P1
(T,RH)
M32286
Table 6. Single Enthalpy and Dual Enthalpy High Limit Curves.
Enthalpy
Curve
Temp.
Dry-Bulb (°F)
Temp.
Dewpoint (°F)
Enthalpy
(btu/lb/da)
Point P1 Point P2
Temp. °F Humidity %RH Temp. °F Humidity %RH
ES1 80.0 60.0 28.0 80.0 36.8 66.3 80.1
ES2 75.0 57.0 26.0 75.0 39.6 63.3 80.0
ES3 70.0 54.0 24.0 70.0 42.3 59.7 81.4
ES4 65.0 51.0 22.0 65.0 44.8 55.7 84.2
ES5 60.0 48.0 20.0 60.0 46.9 51.3 88.5
HL 86.0 66.0 32.4 86.0 38.9 72.4 80.3
To Next Page
Loading...
